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Updated: Dec 9, 2025

Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments

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Published on: January 23, 2017

The relationship between alertness and spatial attention under simulated shiftwork.

D Chandrakumar¹, J Dorrian², S Banks²

¹Behaviour-Brain-Body Research Centre, Justice & Society, University of South Australia, Adelaide, SA, Australia. Dilushi.Chandrakumar@mymail.unisa.edu.au.

Scientific Reports

|September 12, 2020

Summary

This summary is machine-generated.

Lowered alertness during simulated shiftwork impaired spatial attention, causing slower reactions and increased errors, particularly for left-sided peripheral stimuli. This suggests a potential compromise in reacting to left-side information when fatigued.

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Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments

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Published on: August 8, 2019

Area of Science:

Cognitive Psychology
Neuroscience
Occupational Health

Background:

Alertness levels influence spatial attention biases, with higher alertness linked to leftward bias and lower alertness to rightward bias.
Shiftworking conditions can significantly impact alertness, posing risks to health and safety.
Understanding the interplay between alertness and spatial attention is crucial for mitigating risks associated with altered work schedules.

Purpose of the Study:

To investigate the relationship between alertness and spatial attention under simulated shiftworking conditions.
To determine if changes in alertness affect spatial bias and attentional focus.
To assess the implications for safety and performance in shiftwork environments.

Main Methods:

A seven-day laboratory-based simulated shiftwork study involving 19 healthy participants.
Assessment of alertness using the Stanford Sleepiness Scale and Psychomotor Vigilance Task.
Evaluation of spatial attention using the Landmark Task and Detection Task.

Main Results:

Lowered alertness correlated with slower reaction times and more omissions on the Detection Task, especially for peripheral stimuli.
Evidence suggests a narrowing of visuospatial attention and a slight left-sided neglect under conditions of lowered alertness.
No significant associations were found between alertness levels and spatial bias on the Landmark Task.

Conclusions:

Findings indicate that reduced alertness during simulated shiftwork may lead to a slight neglect of the left visual field and narrowed attention.
Compromised ability to detect peripheral and left-sided information under fatigue highlights potential safety concerns.
Further research is needed to fully elucidate the complex relationship between spatial attention and alertness in shiftwork settings.